#6699: [with spkg; needs work] Update to Maxima 5.19.1 (particularly important
for
Solaris support).
----------------------+-----------------------------------------------------
Reporter: drkirkby | Owner: mabshoff
Type: defect | Status: new
Priority: major | Milestone: sage-4.1.2
Component: packages | Keywords: maxima
Reviewer: | Author: David Kirkby
Merged: |
----------------------+-----------------------------------------------------
Comment(by gmhossain):
Replying to [comment:6 AlexGhitza]:
> {{{
sage -t "expression.pyx"
**********************************************************************
File "/opt/sage-4.1.1/devel/sage-main/sage/symbolic/expression.pyx", line
5541:
sage: solve(Q*sqrt(Q^2 + 2) - 1,Q)
Expected:
[Q == 1/sqrt(-sqrt(2) + 1), Q == 1/sqrt(sqrt(2) + 1)]
Got:
[Q == 1/sqrt(sqrt(2) + 1)]
**********************************************************************
}}}
>
> I think this is due to the fact that Maxima now only returns the real
solution, and ignores the complex solution. I'm not sure what we should
do about this.
I think you are right. Maxima treats variables to be real by default. To
see that in maxima
{{{
sage: !maxima
Maxima 5.16.3 http://maxima.sourceforge.net
Using Lisp ECL 9.4.1
Distributed under the GNU Public License. See the file COPYING.
Dedicated to the memory of William Schelter.
The function bug_report() provides bug reporting information.
(%i1) conjugate(Q);
(%o1) Q
}}}
So, if maxima is throwing away complex solution then its consistent with
its own assumptions.
Unless someone else has different opinion then we should simply accept
what maxima is returning
now.
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/6699#comment:7>
Sage <http://sagemath.org/>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
--~--~---------~--~----~------------~-------~--~----~
You received this message because you are subscribed to the Google Groups
"sage-trac" group.
To post to this group, send email to [email protected]
To unsubscribe from this group, send email to
[email protected]
For more options, visit this group at
http://groups.google.com/group/sage-trac?hl=en
-~----------~----~----~----~------~----~------~--~---
